Yeah I'm open to more suggestions, especially having a couple where you can see your progress, and notice that it's doing something. I mean, I have found a bunch of various other exercises in back pain related books I've read, with explanations which muscles they use and which problems they can help or prevent if done regularly, but the example programs in those kinds of books are most often set up that they suggest a list of exercises you ought to do every day or every other day and just keep doing them. And many exercises are stuff like for example that "cat-cow" exercise, where you stretch your back and such, but you don't really get "better" at them.